: : Need advice on plumbing an island. The main drain is at the outside wall and the island will be 6' away. The outside wall stack will have to supply the air, but my question is how do I make the loop for the drain? Is the air loop "y" taken off before the drain or after??? Thanks

Is it possible to have the foot vent be part of te main drain? Where my drain will connect to the stack I do not have enough room to run both the drain and the foot vent. Does the Strodor valve work?